question_answer 40)

  Which of the following are true for an element? Atomic number = number of protons + number of electrons Mass number = number of protons + number of neutrons Atomic number = number of protons = number of neutrons Atomic number = number of protons = number of electrons (a) (i) and (ii)                      (b) (i) and (iii)                     (c) (ii) and (iii)                    (d) (ii) and (iv)

Answer:

  (d) Points (ii) and (iv) are correct.